"For years, most Linux distributions have been using an init daemon based on the one found in Unix System V. The init daemon is spawned by the kernel itself, and tasked with booting the rest of the system, starting all other processes, and taking care of them when they need to be stopped or when they die. While the System V init setup has worked well for Linux in the past, it hasn't aged well - which is why we're replacing the aging init system with Upstart in Ubuntu 6.10, codenamed Edgy Eft."